Apparatus for swaging dental plates.



c. G. FRANKEA APPARATUS FOR SWAGING DENTAL PLATES.

Patented Aug; 16, 1910.

APPLICATION IILED JAN. 2 2, 1908. 967,873.

6&7 627M756,

v v I A ('lttoznup UNITED STATES PATENT OFFICE.

CARL GUSTAVE FRANKIE, OF MONROE, MICHIGAN.

APPARATUS FOR SWAGING DENTAL PLATES.

To all whom it may concern:

Be it known that I, CARL G. FRANKIE, a citizen of the United States,residing at Monroe, in the county of Monroe and State of Michigan, haveinvented a new and useful Apparatus for Swaging Dental Plates, of whichthe following is a specification.

This invention relates to apparatus for swaging dental plates, and itsobject is to provide a simple and efficient device of this characterwhich is comparatively inexpensive to manufacture.

In the accompanying drawings :Figure 1 is a central vertical sectionthrough the device, the positions of the movable parts, when the deviceis open, being indicated by dotted lines. Fig. 2 is a plan view of theupper member of the device. Fig. 8 is a plan View of the lower member.

Referring to the figures by characters of reference 1 designates acup-like member constituting the base of the apparatus and provided withspaced parallel ears 12 outstanding therefrom and designed to receivebetween them an ear 13, outstanding from the upper inverted cup member2. The ears 12 and 13 are connected by means of a pivot 14, so that theupper member 2 is thus capable of swinging into a raised position, asindicated by dotted lines in Fig. 1.

Outstanding from the lower or base member 1, at points substantiallydiametrically opposite the ear 12, are spaced ears 7 having a pivot pin8 extending therethrough and on which is mounted an eye formed at oneend of a bolt 9. Spaced ears 28 also eX- tend outwardly from the uppermember 2 of the apparatus at points substantially diametrically oppositethe ear 13, and when the said member 2 is in closed position the bolt 9is adapted to swing into position between the ears 28, said bolt beingprovided with a wing-nut 10 designed to be screwed thereon and againstthe ears 28 so as to draw said ears in the direction of the ears 7 andthus tightly bind the two sections 1 and 2 together.

The cup member 1 is counter-bored at its upper end as indicated at 24 soas to receive a circular flange 2 2 formed upon the adjoining face ofthe upper member 2. When the two members 1 and 2 are thus positionedwith their adjoining faces in contact and locked by means of the bolt 9and the nut 10 Specification of Letters Patent.

Application filed January 22, 1908.

Patented Aug. 16, 1910.

Serial No. 412,179.

the compartments 3 and 15 formed within the two members 1 and 2 willregister.

A plunger 18 is slidably mounted within an opening 19 formed centrallywithin the upper member 2, and arranged upon the lower or inner end ofthis plunger is a circular or cylindrical head 16, the lower or workingface of which is concaved as indicated in Fig. 1. The upper or outer endof the plunger is reduced annularly as in dicated at 21, so that anyupsetting of the plunger caused by constant striking thereof with ahammer or other tool, will not enlarge the said end to such an extent asto prevent the withdrawal of the plunger through the opening 19.

In using the apparatus herein described the upper member 2 is releasedfrom the bolt 9 and the nut 10 and swung into the position indicated bydotted lines in Fig. 1. The plunger 18 is then inserted in the opening19, after which the die is placed within the compartment 3, as indicatedat 4, and the plate 25 is positioned thereon. This plate may be coveredwith rubber or thin fabric, as ordinarily, so as to prevent the swagingmaterial from entering between the die and the plate. A quantity ofpotters clay, or other swaging material is then placed within thecompartment 15 and upon the concaved face 17 of the head 16, after whichthe member 2 is swung into closed position and secured by placing thebolt 9 between the ears 28 and tightening the nut 10. The swagingmaterial will thus assume a position upon the plate 25 and, by drivingthe plunger 18 downwardly, this swaging material will be spread evenlyover the plate 25 and will distribute pressure over all portions of thesaid plate so as to bend the plate downward and cause it to conform withthe contour of the die 4, it being understood that suiiicient swagingmaterial is used to prevent the head 16 from coming into contact withthe plate.

It is often desirable to inspect the plate before the swaging or shapingoperation is completed, but this has heretofore been found difficult,for it has been practically impossible to return the parts to thepositions initially assumed by them. In the present construction howeverthe flange 22 and the counter-sink indicated at 24 cooperate to obviatethis objectionable feature, in-

movably mounted Within the compartment of one of these members, a headcarried by the plunger and having a concave Work-facing surface, thecross sectional area of the head being equal to the cross sectional areaof the compartment in Which it is located, the compartment of the othermember being adapted to receive a die. I

In testimony that I claim the foregoing as my own, I have hereto afiixedmy signature in the presence of two Witnesses.

CARL GUSTAVE FRANKIE.

Witnesses: JOHN T. I'IAMMER, JOHN C. HAMMER.

